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Two Egyptian police killed in Sinai town - sources

CAIRO, July 5 (Reuters) - Two Egyptian police officers were shot dead on Friday by unknown gunmen in the Sinai town of El-Arish in front of a government building, medical sources said, the latest of a string of security incidents in the lawless region.

The police officers were guarding the building when the gunmen shot at them, the sources said.

Islamist gunmen attacked armed forces guarding the El-Arish airport early on Friday. It was not clear whether the attack, and another on a police station in the nearby town of Rafah, on the Gaza border, were in reaction to the army's overthrow of elected Islamist President Mohamed Mursi on Wednesday.

WASHINGTON - Israeli Prime Minister Benjamin Netanyahu warned U.S. President Barack Obama on Tuesday against accepting a nuclear deal with Iran that would be a "countdown to a potential nuclear nightmare" by a country that "will always be an enemy of America". | Video